Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10773/5668
Título: | Photoluminescence and damage recovery studies in Fe-implanted ZnO single crystals |
Autor: | Monteiro, T. Boemare, C. Soares, M.J. Rita, E. Alves, E. |
Data: | Jun-2003 |
Editora: | American Institute of Physics |
Resumo: | We report Fe3+-related emission in ion-implanted ZnO single crystals. Iron ions were implanted at room temperature with 100 keV and a fluence of 1×1016 Fe+/cm2, and were submitted to annealing treatments in vacuum and in air. After implantation, the damage raises the minimum yield (χmin) from 2% to 50%. Annealing in an oxidizing atmosphere leads to a reduction of the implantation damage, which is fully recovered after annealing at 1050 °C with a χmin∼3% in the implanted region. With extrinsic excitation, red Fe-related emission is observed at low temperatures. The intensity is dependent on the annealing conditions. For samples annealed in air, the luminescence can be detected up to 120 K. When a comparison is made between unimplanted and post-implanted annealed samples, noticeable changes on near-band-edge and deep-level photoluminescence spectra are observed. A thermally populated structured green emission could be observed in the sample annealed in air, as shown by the temperature-dependent photoluminescence excitation studies. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/5668 |
ISSN: | 0021-8979 |
Aparece nas coleções: | DFis - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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JAPL.pdf | versão pdf do editor | 100.15 kB | Adobe PDF | Ver/Abrir |
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